Relationship between physical memory and oracle initialization parameter

Hi all

I had been confused with the oracle initialization parameter setting.

When set us the oracle initialization parameter. For example: Shared pool size, db_cache_size, target memory.

What to consider about the physical memory to the operating system. If so, how to address the issue?

Please notify. Thank you.

SagiGal wrote:

Review you mean that if the physical memory is 2gig, and you are ready to set the SGA greater than this, it will work or not, the answer would be that it would be a very bad thing to do. These parameters represent the SGA, which must be restricted in respect of the maximum physical memory available on the server.

See the link given by Rp. From 10 g, it rarely need this kind of tuning.

Aman...

Understand. Thank you. Can answer me another question?

SQL > show sga parameter

VALUE OF TYPE NAME
------------------------------------ ----------- ------------------------------
lock_sga boolean FALSE
PRE_PAGE_SGA boolean FALSE
very large integer SGA_MAX_SIZE 1152 M
SGA_TARGET large integer 0
SQL > show the spfile parameter

VALUE OF TYPE NAME
------------------------------------ ----------- ------------------------------
chain of SPFile

in the above scenario, the database do not use EAMA and spfile
If I wan to increase db_cache_size parameter, do I rebounce instance?

Could be very easily answer this question for yourself by searching for the parameter in the docs. See here,
http://docs.Oracle.com/CD/E11882_01/server.112/e25513/initparams052.htm#REFRN10033

Its a dynamic parameter and does not need a db bouncing to change.

Aman...

Tags: Database

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